An intimate look at the life, career and process of one of the most accomplished songwriters of all time, Diane Warren.

This year’s iHeartRadio Jingle Ball Tour included performances from artists including Cher, Sabrina Carpenter, OneRepublic, Niall Horan, Doechii, Big Time Rush, Jelly Roll, AJR, Pentatonix, Melanie Martinez, Paul Russell and…